Home / 20,917.28-31,344.76-11,559.97

Finding the Fourth Proportional to 20,917.28, 31,344.76 and 11,559.97

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Solution

The fourth proportional to 20,917.28, 31,344.76 and 11,559.97 is: 17,322.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.28 : 31,344.76 = 11,559.97 : x
  2. Step 2: Convert to fraction form
    20,917.28/31,344.76 = 11,559.97/x
  3. Step 3: Cross multiply
    20,917.28x = 31,344.76 × 11,559.97
  4. Step 4: Simplify right side
    20,917.28x = 362,344,270.73
  5. Step 5: Solve for x
    x = 362,344,270.73/20,917.28
  6. Step 6: Final answer
    x = 17,322.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.